My dad died of bone marrow cancer two years ago. They were trying to kill all his cancerous cells so they could use his own stem cells to rebuild his bone marrow (blood cell factory). This is after no family members matched his stem cells for a transplant. The treatment to kill the cancer, killed him before it got all the cancer. A matching stem cell donor or a new method might have made a difference. He was only 58 and in very good health leading up to this. Took him in less than one year. He was a good and cool guy. If they aren't killing people or animals for the research, what's the problem?